| Super Unit O-13-29589 | Flintlock Exploration, LLC only | Big Mineral Creek (Consolidated) | Grayson | 162 | 2.46M | 1.33M | Dec 1998 – Jul 2026 |
| Sherman /7500 Sand/ Unit O-13-11505 | BKM Production only | Sherman (7500 Sand) | Grayson | 82 | 2.04M | 3.19M | Jan 1993 – Jul 2026 |
| Little, O. L. O-13-3060 | Export Petroleum Corporation only | Sherman, East | Grayson | 11 | 1.97M | 21 | Jan 1993 – Jul 2026 |
| Brown, Beth, Etal O-13-3085 | BKM Production only | Sherman, East | Grayson | 10 | 1.05M | 19.8K | Jan 1993 – Jul 2026 |
| Hazelwood O-13-30027 | Tatanka Operating, LLC only | Gordonville, S. (Penn.) | Grayson | 2 | 980K | 1.71M | Oct 2001 – Jul 2026 |
| Sadler /Penn./ Field Unit O-13-11127 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 64 | 738K | 425K | Jan 1993 – Jul 2026 |
| Country Club O-13-28065 | R2Q Operating LLC only | Gary Henry (Lower Baker Sand) | Grayson | 3 | 639K | 678K | Jan 1993 – Jul 2026 |
| Hudgins, John O-13-29593 | Tatanka Operating, LLC only | Preston (Davis, Lower) | Grayson | 4 | 633K | 4.7M | Jul 1998 – Jul 2026 |
| Degan Sand Unit O-13-15475 | BLS Production Co., Inc. only | Collinsville, SE. (4100 Degan) | Grayson | 16 | 596K | 21 | Jan 1993 – Jul 2026 |
| North Sadler Penn Unit O-13-28749 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 17 | 593K | 480K | Apr 1994 – Jul 2026 |
| Big Mineral Creek (UV Sand) Unit O-13-31699 | Flintlock Exploration, LLC only | Big Mineral Creek (UV Sand Unit) | Grayson | 31 | 548K | 1.7M | Sep 2010 – Jul 2026 |
| Big Mineral Creek -S- Sand Unit O-13-14655 | Venoco, Inc. only | Big Mineral Creek (S Sdstn.) | Grayson | 46 | 539K | 242K | Jan 1993 – Jan 2001 |
| Lawrence Trust Unit O-13-31727 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 3 | 512K | 1.23M | Mar 2010 – Jul 2026 |
| Green O-13-29412 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 4 | 497K | 4.11M | Sep 1997 – Jul 2026 |
| Degan Sand Unit O-13-16376 | Felderhoff Production Company only | Tioga, East (Degan Sand) | Grayson | 14 | 461K | 465 | Jan 1993 – Jul 2026 |
| Big Mineral Creek/Strawn I/Unit O-13-20115 | Venoco, Inc. only | Big Mineral Creek (Strawn) | Grayson | 52 | 427K | 43.9K | Jan 1993 – Jun 1999 |
| Sherman /8900 Penn./ Unit O-13-12470 | BKM Production only | Sherman (Pennsylvanian 8900) | Grayson | 36 | 410K | 1.98M | Jan 1993 – Jul 2026 |
| Sandusky /Oil Creek Sd./ Unit O-13-8512 | Silver Creek Oil & Gas, LLC only | Sandusky (Oil Creek Sd.) | Grayson | 15 | 383K | 609K | Jan 1993 – Jul 2026 |
| Bennett a Unit O-13-32207 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 2 | 370K | 985K | Sep 2011 – Nov 2023 |
| Bryan O-13-30258 | R2Q Operating LLC only | Big Indian (Dornick Hills) | Grayson | 2 | 366K | 2.76M | Jan 2004 – Jul 2026 |
| Handy Unit O-13-12451 | BLS Production Co., Inc. only | Handy, Southeast (H Sand) | Grayson | 14 | 339K | 448K | Jan 1993 – Jul 2026 |
| John Marshall O-13-34051 | Silver Creek Oil & Gas, LLC only | Sandusky, West (Strawn) | Grayson | 3 | 334K | 35.1K | Oct 2021 – Jul 2026 |
| Davis Unit O-13-31898 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 317K | 534K | Jan 2011 – Dec 2018 |
| Renfro Unit O-13-33235 | Silver Creek Oil & Gas, LLC only | Sandusky | Grayson | 2 | 292K | 912K | Feb 2015 – Jul 2026 |
| Dutch Unit O-13-32960 | Silver Creek Oil & Gas, LLC only | Sandusky | Grayson | 2 | 285K | 1.61M | Apr 2014 – Jul 2026 |
| Wood O-13-29081 | Grayson Petroleum Company only | Gee (Oil Creek, Upper) | Grayson | 3 | 271K | 0 | Jan 1996 – Dec 2022 |
| Big Mineral Creek/Barnes SD/Unit O-13-12557 | Venoco, Inc. only | Big Mineral Creek (Barnes Sand) | Grayson | 40 | 267K | 105K | Jan 1993 – Mar 2008 |
| Holland O-13-26434 | BKM Production only | Perrin, N. Afb (Cordell Sd.) | Grayson | 1 | 232K | 2.38M | Jan 1993 – Jul 2026 |
| Barnes, J. E. O-13-29561 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 231K | 2.39M | Jul 1998 – Jul 2026 |
| Gray, John G. O-13-30760 | Seitz, J. R. & Adam, Ltd. only | Dove (Penn. Basal) | Grayson | 5 | 230K | 0 | Jan 2007 – Jul 2026 |
| Slagle-Fallon O-13-28319 | Little, Quintin Company,inc.,the only | Southmayd, North (Baker-Viola) | Grayson | 1 | 223K | 327K | Jan 1993 – Jul 2026 |
| Robertson, Joe 2 O-13-28190 | BKM Production only | Sherman (Ordivician 9,450) | Grayson | 1 | 223K | 1.61M | Jan 1993 – Jul 2026 |
| Sadler (Dornick Hills) Sand Unit O-13-27921 | Grayson Petroleum Company only | Andrade (Dornick Hills) | Grayson | 13 | 222K | 21 | Jan 1993 – Jul 2026 |
| Sweeney, Helen O.,mrs O-13-29600 | BLS Production Co., Inc. only | Big Mineral Creek (Consolidated) | Grayson | 5 | 201K | 55.1K | Dec 1998 – Jul 2026 |
| Reddick (V) O-13-32968 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 196K | 531K | Oct 2013 – Jul 2026 |
| Otto O-13-34291 | Jetta Operating Company, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 195K | 328K | Apr 2024 – Jul 2026 |
| Lilly Unit O-13-32970 | Silver Creek Oil & Gas, LLC only | Sandusky | Grayson | 3 | 194K | 1.65M | Nov 2013 – Jul 2026 |
| Fulton, C. T. O-13-30390 | Robertson-Bryce Management, LLC only | Pottsboro, West (Davis Sd.) | Grayson | 1 | 186K | 1.33M | Jun 2004 – Jul 2026 |
| Neal, C. A. O-13-2839 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 3 | 183K | 21 | Jan 1993 – Jul 2026 |
| Slinging Unit O-13-33105 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 1 | 183K | 133K | Jul 2014 – Jul 2026 |
| Bug Off O-13-32325 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 182K | 490K | Aug 2012 – Jul 2026 |
| McKinney O-13-30279 | R2Q Operating LLC only | Big Indian (Dornick Hills) | Grayson | 2 | 178K | 2.15M | Jan 2004 – Jul 2026 |
| Godwin, J. F. O-13-2951 | Flintlock Exploration, LLC only | Sandusky (Dornick Hills) | Grayson | 7 | 174K | 163K | Jan 1993 – Jul 2026 |
| Logston, Aggie O-13-26357 | Charter Oak Production Co., LLC only | Southmayd, North (Baker-Viola) | Grayson | 1 | 167K | 144K | Jan 1993 – Jul 2026 |
| McCullough, C & H O-13-30054 | Tatanka Operating, LLC only | Preston (Davis, Lower) | Grayson | 2 | 163K | 426K | Aug 2002 – Jul 2026 |
| Marshall, John O-13-16540 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 3 | 162K | 119K | Jan 1993 – Jul 2026 |
| Goldstom, M. A. O-13-19979 | Tatanka Operating, LLC only | Philpick (6450) | Grayson | 2 | 162K | 6.29K | Jan 1993 – Jul 2026 |
| Skaggs O-13-32031 | Longfellow Energy, LP only | Denison, S. (Woodlake) | Grayson | 4 | 160K | 573K | Jul 2011 – Jul 2026 |
| Graham, J. O-13-23516 | BKM Production only | Sherman (Pennsylvanian 8900) | Grayson | 1 | 160K | 568K | Jan 1993 – Jul 2026 |
| Hipke Reast O-13-29063 | Felderhoff Production Company only | Sandusky, West (Penn.) | Grayson | 2 | 158K | 36.4K | Jan 1996 – Jul 2026 |